Hydraulic coupling



FIG. 1 is a left side view of a hydraulic coupling showing the new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a front perspective view thereof; and,

FIG. 7 is a rear perspective view thereof.

The broken lines showing in the drawings are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a hydraulic coupling, as shown and described. 